Car-brake.



No. 773,190. PATENTED OCT. 25, 1904.

A. BROWN.

GAR BRAKE.

APPLICATION FILED MAR. 3, 1904.

H0 MODEL.

a g 5 9 wmnl M 76 Patented October 25, 1904.

PATENT Orricn.

ALEXANDER BROWVN, OF SPRINGFIELD, OHIO.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 773,190, dated October25, 1904. Application filed March 3, 1904- Serial No. 196,343- (Nomodel.)

To all 1071 0727 it may concern.-

Be it known that I, ALEXANDER BROWN, a citizen of the United States,residing at Springfield, in the county of Clark and State of Ohio, haveinvented certain new and useful improvements in Oar-Brakes, of which thefollowing is a specification.

, This invention relates to improvements in braking mechanisms adaptedfor use upon cars or the like, and aims to provide a'novel means foreffecting the braking action of brake-shoes engaging the wheels of thevehicle to which the invention is applied. In'

carrying out the invention the brake-shoes are supported by suitablehangers and are adapted to be forced into and out of braking,

engagement with the adjacent car-wheels by means of peculiarly-mountedactuators cooperating therewith.

For a full description of the invention and the merits thereof and alsoto acquire a knowledge of the details of construction of the means foreffecting the result reference is to be had to the following descriptionand accompanying drawings.

WVhile the essential and characteristic features of the invention aresusceptible of modification, still the preferred embodiment of theinvention is illustrated in the accompanying drawings, in which- Figure1 is a perspective View, parts broken away, illustrating the preferredembodiment of the invention. Fig. 2 is a view, parts broken away,bringing out more clearly the arrangement of the brake-shoe and thecooperative engagementof the actuating-eccentric.

Fig. 3 is a perspective view showing the brakeshoe, the friction-plateand body of the shoe being separated.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

The invention is shown in its application to a car, and in the drawings1 designates the caraxle, and 2 the car-wheels, The axle 1 and thewheels 2 are of the usual form and are mounted in the ordinary type oftruck structure, (designated 3.) The brake-shoes 4 are supported byhangers 5, depending from the adjacent portions of the truck-frame, andsaid hangers may be so hung as to cause the brakeshoe 4 to normallyremain in a position adjacent to but out of engagement with the carwheelwith which same cooperates. The brake-shoe, if desirable, may be causedto remain in the normal position aforesaid by use of a spring oranalogous device. The shoe 4 is of a peculiar. form, being composed of abody 6 and a friction-plate 7. The frictionplate 7 is provided upon therear side thereof and projecting from the upper end portion with adownwardly-inclined lug 8, which overlaps the body 6 of the shoe andwhich is provided with an opening to receive a fastening 9, whichsecures the plate 7 to the shoe. To more securely hold thefriction-plate upon the body 6 of the shoe, a dowel-pin 10 is projectedfrom the lower portion of the frictionplate and received by an opening11 in the lower portion of the body 6. The rear side of the body 6 ofthe shoe 4 is cut away upon the arc of a circle, as shown at 12, and ispro vided with a T-shaped groove 13. The means for actuating thebrake-shoe into engagement with the Wheel and for positively withdrawingsame from such engagement comprises an eccentric disk or similarcam-actuator 14, which disk is mounted upon a shaft 15, disposed in rearof the car-wheels. The disk or disks 14 are in interlocking engagementwith the body 6 of the shoe 4, and for this purpose the peripheralportion of the disk 14 is provided with laterallyextending flanges 16.

The flanged peripheral portion of the disk 14 is received by theT-shaped groove 13 of the body 6 of the shoe, and since the disk 14 iseccentrically mounted upon the shaft 15 it will be readily seen thatrotary movement of this disk will cause the brake-shoe to move into orout of engagement with the adjacent wheel. The'shaft 15 may be mountedin suitable supports 17, carried by the truck, and oscillatory movementmay be imparted to this shaft in any desired manner to secure thenecessary braking action of the brake-shoes 4.

The means for actuating the shaft 15 when it is designed to operate thispart by manual power consists, preferably, of the horizontally-disposedor eccentric wheel 18, which wheel is connected to a rock-arm 19,rigidly mounted upon the shaft 15 bymeans of a connecting-rod 20. Theusual manually-operated shaft 21 may be employed to actuate thecocentric wheel 18, to thereby impart the necessary oscillatory movementto the shaft 15. The shaft 21 may be provided at its upper end with thecrank-handle 22-, to be grasped by the motorman. c

It will be understood that the eccentric disks 1e constitute virtually acam-operating connection between the brake-shoes and the shaft 15, and,as will be readily comprehended, the parts may be modified inconstruction in accordance with the broad spirit of the invention. Theuse of the eccentric actuators is greatly advantageous in that greatpower may be secured to effect the necessary braking action of the shoe.

Having thus described the invention, what is claimed as new is- 1. In acar-brake, the combination of a brake-shoe provided with a groove, andan eccentric actuator provided with a flange engaged in the groove ofthe brake-shoe aforesaid.

2. In a ear-brake, the combination of a brake-shoe provided with aT-shaped groove therein, an eccentric actuator, and flanges projectedthrough the said actuator and engaged in the T-shaped groove of thebrake-shoe aforesaid.

3. In a car-brake, the combination of a brake-shoe, provided with anarcnate groove therein and an eccentrically-mounted actuating-diskhaving a flange projected therefrom and engaging the arcuate groove ofthe brakeshoe aforesaid.

4c. In a car-brake, the combination of a brake-shoe comprising a bodyand a removable friction-plate, the body being provided in the rear sidethereof with a T-shaped groove, an eccentric disk operating adjacent thebrakesho'e, and laterally-projected flanges extended from the eccentricdisk and received in the T- shaped groove of the body of the brake-shoe.

5. In a carbrake, the combination of a brake-shoe, and an eccentricactuator interlocking with said brake-shoe to effect braking actionthereof.

6. In a car-brake, the combination of an eccentrieally-flanged disk, anda brake-shoe engaged by the flanged portion of said disk, whereby aninterlocking connection is formed between the shoe and disk.

7. In a car brake, the combination of a brake-shoe, and an eccentricactuating-disk provided with a projecting part interlocking with thebrake-shoe for effecting braking engagement of said shoe.

In testimony whereof I affix my signature in presence of two witnesses.

ALEXANDER BROWVN. [L. s.

Witnesses:

JAooB W. STEINI-IAUER, MICHAEL J. MoHUGH.

